Checkmate is an open-source, self-hosted tool designed to track and monitor server hardware, uptime, response times, and incidents in real-time with beautiful visualizations.

✨Spark is a web-based, cross-platform and full-featured Remote Administration Tool (RAT) written in Go that allows you control all your devices anywhere. Spark是一个Go编写的，网页UI、跨平台以及多功能的远程控制和监控工具，你可以随时随地监控和控制所有设备。

Monitorix is a free, open source, lightweight system monitoring tool.

Server Monitoring Command for Laravel Applications

Lightweight monitoring and analytics for API frameworks.

A responsive, eye-pleasing Linux server statistics dashboard.

Manage multiple servers with different operating systems, configurations, requirements etc. for many separate customers in an outsourcing model.

Lightweight and minimalistic open-source Servers and HTTP monitor

A PHP application to monitor the health of your servers

HetrixTools Server Monitoring Agent (Linux)

SSH System Monitoring -- Server monitoring over ssh for lazy people.

A Laravel Nova tool for Spatie's Server Monitor library.

Dashboard for WordOps backend

A CLI Remote Administration Tool for administrating a network over a TCP connection. Extremely simple and modular containing over 30 commands.

Nagmap Reborn - Standalone integration with some server monitoring systems providing a user-friendly interface through geographic visualization.

sspender helps you suspend your server (and spindown disks) when idle.

🤠How to Set up Rancher Server Monitoring with TIG Stack?

360 monitoring agent

Self-hosted website monitoring

Raspberry Pi (and Linux) simple remote monitoring tool with dashboard for multiple RPi devices. It works for any Linux device.